Use the FILES
command to find the name of the shape (.shp
) file
that is located in the dat
area of SYS.
nM> files ext=shp aux=dat
Auxiliary [DAT] = /home/student/nxm230/nxm/sys/dat/ (1 files)
world.shp
Use the STATUS
command to find out the size (number of bytes) of the
shape file in the dat
area of SYS.
nM> status /home/student/nxm230/nxm/sys/dat/world.shp
ShapeFile : file:/home/student/nxm230/nxm/sys/dat/world.shp
Code : 9994
Length : 217802
Version : 1000
Size : 435604.0
Type : Polygon
X1,X2 : (-180.0,180.0)
Y1,Y2 : (-90.0,83.60220336914062)
DB File : /home/student/nxm230/nxm/sys/dat/world.dbf, exists=true
Comment : null
Use DATALIST
to list the data in airports.csv
.
nM> datalist airports.csv
0: {COL_1="AIRPORT NAME",COL_2="CODE",COL_3="LATITUDE",COL_4="LONGITUDE"}
1: {COL_1="Abu Dhabi",COL_2="AUH",COL_3="024.43333",COL_4="054.65000"}
2: {COL_1="Adelaide",COL_2="ADL",COL_3="-034.94639",COL_4="138.52944"}
3: {COL_1="Agnew",COL_2="AGW",COL_3="-028.01667",COL_4="120.53333"}
4: {COL_1="Albany",COL_2="ALH",COL_3="-034.94472",COL_4="117.80750"}
5: {COL_1="Albury",COL_2="ABX",COL_3="-036.06889",COL_4="146.95639"}
6: {COL_1="Alcoota",COL_2="ALC",COL_3="-022.83333",COL_4="134.45000"}
Note that the first line is a header.
Now use STATUS
with the /d
switch to list the header
and data in airports.csv
. But, this time, give it the
HEADERROWS=1
qualifier, and see what happens.
nM> status airports.csv{headerrows=1} /d
CsvFile : file:/home/student/nxm230/nxm/sys/dat/airports.csv
Rows : 726
Columns : 4
Header : First Row
Column Name=AIRPORT_NAME Format=??
Column Name=CODE Format=??
Column Name=LATITUDE Format=??
Column Name=LONGITUDE Format=??
0: {AIRPORT_NAME="Abu Dhabi",CODE="AUH",LATITUDE="024.43333",LONGITUDE="054.65000"}
1: {AIRPORT_NAME="Adelaide",CODE="ADL",LATITUDE="-034.94639",LONGITUDE="138.52944"}
2: {AIRPORT_NAME="Agnew",CODE="AGW",LATITUDE="-028.01667",LONGITUDE="120.53333"}
3: {AIRPORT_NAME="Albany",CODE="ALH",LATITUDE="-034.94472",LONGITUDE="117.80750"}
4: {AIRPORT_NAME="Albury",CODE="ABX",LATITUDE="-036.06889",LONGITUDE="146.95639"}
5: {AIRPORT_NAME="Alcoota",CODE="ALC",LATITUDE="-022.83333",LONGITUDE="134.45000"}
Set up an AUX called WEB and point it to
http://nextmidas.techma.com/nm/nxm/sys/dat/
. Now list the header of
the world.prm in this AUX.
nM> set AUX.WEB "http://nextmidas.techma.com/nm/nxm/sys/dat/"
nM> status world.prm{AUX=WEB}
Use the HEADER
command to create the similarly named files called
temp_xxx_file.tmp
, temp_yyy_file.tmp
,
temp_xyx_file.tmp
, and temp_zzy_file.tmp
. Then use
the FILES
command to find all files starting with temp_,
with a y somewhere after the temp_ and ending with _file.
Use the FILES/E
command to erase all of the files you created.
nM> header/create temp_xxx_file.tmp
nM> header/create temp_yyy_file.tmp
nM> header/create temp_xyx_file.tmp
nM> header/create temp_zzy_file.tmp
nM> files name=temp_*y*_file
Auxiliary [1] = /midas/data1/student/ (3 files)
temp_yyy_file.tmp temp_xyx_file.tmp temp_zzy_file.tmp
nM> files/e name=temp_*_file
NOTE: Erase does not take in wild cards, so
erase temp_*_file
will not work.
Use FNAME
to form the path for the DAT area of the SYS option tree.
nM> FNAME datDir AREA=DAT NAME="" EXT="" OPT=SYS
nM> res datDir
31S: DATDIR = /home/midas/nxmxxx/nxm/sys/dat/
or
nM> FNAME datDir AREA=DAT
nM> res datDir
31S: DATDIR = /home/midas/nxmxxx/nxm/sys/dat/
using the defaults for NAME
, EXT
and OPT
Use FILE
to open the airports.csv
file, convert it into a
table with a row prefix of R_
excluding the header, then close the file.
nM> file open filetag airports.csv{HEADERROWS=1}
nM> res t:tbl filetag.toTable(R_)
nM> file close filetag
nM> res/all tbl
T: TBL = Table of 726 entries
T: R_1 = Table of 4 entries
9S: AIRPORT_NAME = Abu Dhabi
3S: CODE = AUH
9S: LATITUDE = 024.43333
9S: LONGITUDE = 054.65000
T: R_2 = Table of 4 entries
8S: AIRPORT_NAME = Adelaide
3S: CODE = ADL
10S: LATITUDE = -034.94639
9S: LONGITUDE = 138.52944
...